CN1213098A - Display device and electronic watch using the device - Google Patents
Display device and electronic watch using the device Download PDFInfo
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- CN1213098A CN1213098A CN98116869A CN98116869A CN1213098A CN 1213098 A CN1213098 A CN 1213098A CN 98116869 A CN98116869 A CN 98116869A CN 98116869 A CN98116869 A CN 98116869A CN 1213098 A CN1213098 A CN 1213098A
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- light
- polarization
- polarized
- separation device
- linearly polarized
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
- G02F1/133536—Reflective polarizers
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133553—Reflecting elements
- G02F1/133555—Transflectors
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- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G9/00—Visual time or date indication means
- G04G9/0023—Visual time or date indication means by light valves in general
- G04G9/0029—Details
- G04G9/0035—Details constructional
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
- G02F1/13324—Circuits comprising solar cells
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
- G02F1/134327—Segmented, e.g. alpha numeric display
Abstract
A display device and an electronic watch permit various information to be clearly distinguished from a background when a solar battery is placed within a display area for displaying the information. A display device and the like include a polarizer, a liquid crystal layer, a polarization separating film, and a solar battery. The polarization separating film operates to transmit linearly polarized light Q polarized in one direction and to reflect other linearly polarized light P. Since the surface of the solar battery has a dark color, such as black, a dark-colored background is displayed by light Q traveling along an optical path. Information, such as numbers, is displayed in a light P reflection color by light that is reflected by the polarization separating film and travels along an optical path. The information, such as numbers, is displayed in a light reflection color. Therefore, information, such as numbers, can be displayed in a high contrast when the solar battery is placed within an inner region of the display plane.
Description
The present invention relates to a kind of display device that is used for showing letter, numeral, pattern and similar information.The invention still further relates to a kind of timing and the electronic watch of demonstration time, for example wrist-watch or stopwatch of being used for.
Up to now, the display device that adopts flat-panel monitor display digit, letter and other kinds information resemble the LCD is widely known to the people.As a kind of like this display device, for example the display device shown in Figure 20 is well-known, wherein a pair of polarizer 52 and 53 is placed the both sides of liquid crystal board 51, and reverberator 54 is placed the back side of a polarizer 53.Place this to such an extent that their polarization axle is met at right angles to polarizer 52 and 53.
In this traditional display device, show information such as numeral by between the electrode of liquid crystal board 51, applying predetermined on state voltage, and come display white background or similar background by applying the shutoff voltage that is lower than on state voltage.In the figure, with the zone that " ON " represents to apply on state voltage, use " OFF " expression to apply the zone of shutoff voltage.
In this display device, when shutoff voltage being applied on the liquid crystal board 51, shown in arrow P, the linearly polarized light of extraneous light--the natural light that promptly is parallel to the paper plane polarization passes polarizer 52, and being transformed into linearly polarized light perpendicular to the paper plane polarization, 90 ° of angles are reversed by the liquid crystal board under the off state 51 in its polarization direction.After passing polarizer 53, by this linearly polarized light of surface imperfection ground reflection of reverberator 54.Part random scatters light passes polarizer 53, liquid crystal board 51 and polarizer 52 successively, and this part light is shown to outside beholder.Thus this part light is regarded to come as the reflected image of reverberator 54, regard uniform white background usually as.
Then, when on state voltage being applied on the liquid crystal board 51, shown in arrow Q, by polarizer 52 linearly polarized light that is parallel to paper plane is taken out from extraneous light, this linearly polarized light passes liquid crystal board 51.Because at this moment liquid crystal board 51 is in conducting state, so the polarization direction of linearly polarized light keeps paralleling and not reversed with paper plane, therefore, this linearly polarized light is absorbed by polarizer 53.Thus, this part light is regarded as dead color from the outside, for example black.
As mentioned above, in this traditional display device, usually on the evenly white background with black or the similarly dark-coloured reflected image that information such as numeral is shown in from reverberator 54 on.
In addition, for example Japanese unexamined patent 52-55565 open file discloses the technology of making solar cell reverberator 54, and this reverberator 54 constitutes the display part of electronic watch.According to this electronic watch, give with the electromotive force of solar cell to be used for tabledriven power source charges, drive liquid crystal board or the like with the table driving power of this charging.
As mentioned above, although people know the reverberator 54 in the display device already and are made of a solar cell, but because the surface of solar cell is generally the dead color such as black or mazarine, so when when coming display background with reverberator 54 reflection extraneous lights, shown in the mark P of Figure 20, background is shown as black or similarly dark-coloured.On the other hand, shown in arrow Q, the information such as numeral is shown as black or similarly dark-coloured by the extinction characteristic that utilizes polarizer 53.
In brief, when reverberator in traditional display device is made of a solar cell, the information such as numeral with black or similarly dead color be shown in similar dead color for example on the background of black.Therefore, can not clearly distinguish information such as numeral.So the technology of a solar cell being put into the display surface of table or analog is not put to practical application yet.When using solar cell, the display surface outside of have to it is placed on table or analog.
In view of the above problems, proposed the present invention, first purpose of the present invention is when a solar cell being put into the display surface of table or analog, can separate information such as numeral and background area.
Second purpose of the present invention is to utilize the light that luminescent device sends in the dark place to produce demonstration on table or analog, and extraneous light does not enter above-mentioned dark place when a solar cell being put into the display surface of table or analog.
Be the solution of the problems referred to above below:
(1) in order to reach above-mentioned first purpose, display device of the present invention comprises: (a) first polarized-light separation device, be used for transmission along the linearly polarized light component of first direction polarization, and be used for forbidding along and the transmission of the linearly polarized light component of the perpendicular direction polarization of this first direction; (b) polarization axle modifier is provided with this device to receive the linearly polarized light that penetrates from first polarized-light separation device and to select changing between the constant state of the state of desiring transmission-polarizing polarisation of light axle and maintenance polarization axle; (c) second polarized-light separation device, cross the polarization axle modifier second polarized-light separation device be arranged on the opposite of first polarized-light separation device, in order to transmission along the linearly polarized light component of second direction polarization and reflection along with the linearly polarized light component of the perpendicular direction polarization of this second direction; (d) solar cell is crossed second polarized-light separation device solar cell is arranged on the opposite of polarization axle modifier, in order to receive extraneous light and to change extraneous light into electric energy.
In above structure and the following structure that will describe, from another viewpoint, can think first polarized-light separation device have transmission from beholder's one side incident light, along the linearly polarized light component of the first predetermined direction polarization and forbid the polarized light separation function of other polarized light of transmission, with transmission from the relative side incident light of beholder, along the linearly polarized light component of this first direction polarization and forbid the polarized light separation function of another polarized light of transmission.
In addition, from another viewpoint, can think second polarized-light separation device have transmission from polarization axle modifier one side incident light along the linearly polarized light component of second direction polarization and reflect the polarized light separation function of another polarized light, but also have transmission from polarization axle modifier opposite incident light, along the polarized light separation function of the linearly polarized light component of this second direction polarization.
First polarized-light separation device can be made of a polarizer commonly used.Polarizer commonly used is a kind ofly to have transmission along the incident ray polarized light component of a direction polarization and forbid the polarization separating element of the characteristic of other linearly polarized light component of transmission.For example, can constitute it by polarization layer of folder between TAC (triacetyl cellulose) protective seam.
The polarization axle modifier can be made of for example liquid crystal.For liquid crystal, can use various liquid crystal, for example TN (twisted nematic) liquid crystal, STN (STN Super TN) liquid crystal and ECB (electrically conerolled birefringence) liquid crystal.Stn liquid crystal comprises the stn liquid crystal that adopts the colorimetric compensation optical anisotropic material, for example F-STN (film compensated STN) liquid crystal.
As well known, solar cell can be made of the element that for example has the silicon PN junction, and it can be transformed into electric energy to the energy of going into from extraneous light radiation such as sun light beam.
Second polarized-light separation device can be by constituting with the lower part: 1) polarized light separation membrane, and as international open file (international open file WO95/17692 number or WO995/27919 number) was disclosed, it had the wherein structure of stacked many films; 2) polarized light separation sheet, it has the structure that wherein quarter-wave λ sheet is placed on the cholesteric liquid crystal layer one or both sides; 3) polarized light separating member is constructed it to such an extent that can be separated into reflect polarized light and transmission-polarizing light (SID 92Digest, 427-429 page or leaf) to light by utilizing the Brewster angle; Or 4) adopted the polarized light separating member of a hologram.
Display device according to such structure, can be optical receiving surface and with passing second polarized-light separation device, arriving solar cell surface, and use the light that does not pass it from the second polarized-light separation device reflected back to show information such as numeral simultaneously from the light display background of top reflected back.Because the surface of solar cell has the dead color resemble black usually, so the background of Xian Shiing also has dead color resemble black in the above described manner.On the other hand, from the surface condition decision of the catoptrical condition of second polarized-light separation device by second polarized-light separation device.If this surface is smooth plane, then reflected light is the specular light of light tone.When the surface of second polarized-light separation device is the astigmatism surface, from the only bright and light inhomogeneous reflection of there reflection.
In brief, according to display device of the present invention or similar device, when solar cell when the reverberator, can be on the background of black or Adjacent color show information such as numeral with the color of light.Therefore, can not be with any practical difficulty to come production watch displays screen or other displays.In addition, because the background in the display plane is that wide region in the display plane is as the optical receiving surface of solar cell, so can make solar cell collect a large amount of extraneous lights and these light are transformed into electric energy.Also have, owing to can put into solar cell the viewing area of demonstration viewing information such as numerical information, so with wherein solar cell and viewing area conventional situation placed apart being compared, can reduce the overall dimensions of display device significantly, perhaps can set up a wideer viewing area for watch displays screen or analog.
(2) although second polarized-light separation device can be made of the device in the various display devices with aforesaid structure, not excessive it when constituting by polarized light separation membrane with the disclosed structure of aforementioned international open file (WO 95/17692 or WO 95/27919), also can as structure shown in Figure 2 for example it.Polarized light separation membrane 12 as described herein has the sandwich construction of wherein alternately laminated two kinds of layer A and B.Two-layer about these layers A that adjoin along stacked direction and B, their refractive index is set at identical along a direction, along being set at their refractive index different with the rectangular other direction of this direction.In addition, these layers are different on thickness.
Consider among Fig. 2 three concurrent aces direction X, Y and Z, two kinds of layer A and B are made multilayered state by for example extrusion modling.These layers are extended along a direction (for example directions X), and do not extend along other direction (being the Y direction).That is to say that X-direction is a bearing of trend, Y direction is a horizontal direction.Material B has refractive index n
B(for example, n
B=1.64), this refractive index does not change because of extension substantially.On the other hand, materials A has the characteristic that refractive index wherein changes because of extension.For example, when when one extends axially the sheet of being made by materials A, it has refractive index n on bearing of trend (being directions X)
AX(for example, n
AX=1.88), on horizontal direction (being the Y direction), refractive index n is arranged
AY(for example, n
AY=1.64).
When along the sandwich construction made by materials A and B shown in the directions X extension bitmap 2, bigger refractive index difference Δ n=1.88-1.64=0.24 appears on bearing of trend.On the other hand, with the perpendicular Y direction of directions X on, the refractive index difference Δ n=1.64-1.64=0 between layer A and the B does not have refractive index difference.Because a kind of like this optical characteristics, when light enters polarized light separation membrane 12, pass polarized light separation membrane 12 along the incident light polarization component (a) of the direction E polarization of the axis of homology.On the other hand, face refractive index difference Δ n and by the partial reflection that difference occurs along the incident light polarization light component (b) of the direction F polarization of absorption axes.
In addition, as shown in Figure 3, each is to thickness t 1, t2, the t3 of layer A and B ... different a little, so, the cross section reflection different wave length (b-1) of the enough interlayers of energy, (b-2) ... light.In brief, the sandwich construction that is made of layer A and B with different-thickness allows fully to reflect the light of all wavelengths.Can make up reflected white-light by the thickness of setting those layers that will reflect all wavelengths light.
According to above-mentioned display device with a kind of like this structure, promptly, in this structure, the polarized light separation membrane with the film multi-layer structures that is made of a plurality of laminate films is used as second polarized-light separation device, can make polarized light separation membrane with quite little thickness, and do it to such an extent that flexibility arranged with this structure.Therefore, can reduce the integral thickness of electronic watch or analog and simplify manufacture process.
(3) then, be used for timing and show that the electronic watch of time comprises (a) first polarized-light separation device, be used for transmission along the linearly polarized light component of first direction polarization and forbid the linearly polarized light component of transmission along the direction polarization vertical with first direction according to the present invention; (b) polarization axle modifier is provided with this device and penetrates from the linearly polarized light of first polarized-light separation device with reception and be used for changing the state of desiring transmission-polarizing polarisation of light axle and be used for keeping selecting between the constant state of polarization axle; (c) second polarized-light separation device is crossed opposite that the polarization axle modifier is placed on first polarized-light separation device with the linearly polarized light component of transmission along the linearly polarized light component of second direction polarization and reflection along the direction polarization vertical with second direction with it; (d) solar cell is crossed second polarized-light separation device with it and is placed on the opposite of polarization axle modifier to receive extraneous light and to change extraneous light into electric energy.
According to this electronic watch, similar with the display device described in above (1), when solar cell is used as reverberator, can be with the information of a kind of light tone demonstration such as numeral on black or Adjacent color background.Therefore, can have no practical difficulty ground and produce demonstration.In addition, because the background in the display plane--the zone that is broad in the display plane is as the optical receiving surface of solar cell, so can make solar cell can collect a large amount of extraneous lights and these light are transformed into electric energy.Also have, owing to can put into solar cell the viewing area of demonstration viewing information such as numerical information, so, wherein solar cell and the display plane branch conventional situation of placing that comes is compared, can significantly be reduced the overall dimensions of electronic watch and set up to be used to watch to show or the wide viewing area of similar effect.
(4) in having the electronic watch of said structure, as shown in Figure 2, second polarized-light separation device can be made of the polarized light separation membrane that wherein is laminated with many films.
(5) in order to reach above-mentioned second purpose, be used for timing and show that the electronic watch of time comprises: (a) first polarized-light separation device according to the present invention, be used for transmission along the linearly polarized light component of first direction polarization, and be used for forbidding along and the transmission of the linearly polarized light component of the perpendicular direction polarization of this first direction; (b) polarization axle modifier is provided with this device to receive the linearly polarized light that penetrates from first polarized-light separation device and to select changing between the constant state of the state of desiring transmission-polarizing polarisation of light axle and maintenance polarization axle; (c) second polarized-light separation device, cross the polarization axle modifier second polarized-light separation device be arranged on the opposite of first polarized-light separation device, in order to transmission along the linearly polarized light component of second direction polarization and reflection along with the linearly polarized light component of the perpendicular direction polarization of this second direction; (d) transparent surface emitter is crossed the opposite that second polarized-light separation device is arranged at the transparent surface emitter polarization axle modifier; (e) solar cell is crossed second polarized-light separation device solar cell is arranged on the opposite of polarization axle modifier, in order to receive extraneous light and to change extraneous light into electric energy.
According to this electronic watch, similar with display device described in above (1), when solar cell is used as reverberator, can be with the information of a kind of light tone demonstration such as numeral on the background of black or Adjacent color.Therefore, can have no any practical difficulty real estate green hand shows to show.In addition, because the background in the display plane--be the optical receiving surface that wide portions is used as solar cell in the display plane, so can make a large amount of extraneous light of solar cell collection and these light are changed into electric energy.Also have, owing to can put into solar cell the viewing area of demonstration temporal information such as numerical information, so wherein sun power and viewing area conventional situation placed apart is compared, can significantly be reduced the overall dimensions of electronic watch and set up the wide viewing area that is used for watch displays screen or similar effect.
In addition, according to this electronic watch that adopts the transparent surface emitter, even electronic watch is being placed on the dark local time that does not have extraneous light to enter, also can produce watch displays by the light that is used to the self-induced transparency Surface-Launched Unit, when beholder's direction is seen wrist-watch, this transparent surface emitter is placed on the back side of second polarized-light separation device.
In the electronic watch described in above (5), each element, first polarized-light separation device, polarization axle modifier, solar cell and second polarized-light separation device can be identical with used those in the display device described in above (1).
(6) in the electronic watch described in above (5), although the transparent surface emitter can have any one structure, but preferably it comprises: be used for luminous light source; Light guide member be provided with a light exit surface in polarization axle modifier one side is used for light from light source direct light exit surface.
(7) when light from the photoconduction as the electronic watch described in above (6) when the light exit surface of parts penetrates, by on light exit surface or its apparent surface, forming a protruding part or a recessed part can make light penetrate from light exit surface.For example, luminous energy penetrates from the light exit surface of planar structure in the following manner: as shown in figure 11, form cylindrical protrusions on light exit surface; As shown in figure 15, on light exit surface, form cylindrical grooves; As shown in figure 16, with the exit surface facing surfaces on form tapered protrusion; As shown in figure 17, with the light exit surface facing surfaces on form conical socket; As shown in figure 18, with the light exit surface facing surfaces on form hemispherical projections; Or as shown in figure 19, with the light exit surface facing surfaces on form hemispherical groove.
(8) in having the electronic watch of said structure, the transparent surface emitter can comprise a storage light luminescent layer.This storage light luminescent layer can comprise a substrate, this substrate can maintain by absorbed light activated, be under the excited state electronics and by maintenance electronics and hole compound come luminous.
When so luminous substrate absorbing light, at first, electronics is excited at first excited state, captures these electronics by the trapping centre that is caused by impurity center or lattice imperfection, thereby they are remained on predetermined excited state.Afterwards, the electronics that is kept by trapping centre is turned back to first excited state, make they and hole-recombination by hot activation, luminous thus.A kind of so luminous substrate is for example a kind of strontium aluminum oxide (SrAl that contains as parent crystal
2O
4) and as the substrate of the rare earth element of impurity.
This storage light luminescent layer can be replaced to the light-emitting device that parts and light source constitute by photoconduction with a kind of, perhaps can be fitted together with this light-emitting device.Being suitable for this storage light luminescent layer makes and can deposit energy in storage light luminescent layer in bright environment and in dark environment light is emitted from the storage light luminescent layer based on energy.By utilizing the light of being launched to carry out watch displays.
This storage light luminescent layer will have storage light characteristic and transmission, and some can give the performance of the light of rechargeable solar battery.For this transmittance performance being added, can adopt following method, for example: 1) reduce to store up the thickness of light luminescent layer to storage light luminescent layer; 2) design storage luminescent material; With 3) Chu Guangqu is subdivided into point shape part.When Chu Guangqu being subdivided into point shape part, light passes those parts outside the storage light part and is absorbed by solar cell.By changing the ratio of storage light part, can determine institute's luminous energy of store and by the ratio of the best between the electric energy of sunshine generation.
(9) in having the electronic watch of said structure, can place diffusion layer on beholder's one side of transparent surface emitter.This can realize bright watch displays with the light of penetrating the self-induced transparency Surface-Launched Unit.
(10) in order to realize above-mentioned first purpose, comprise: a polarizer according to electronic watch of the present invention; A TN liquid crystal layer; One be used for transmission along the linearly polarized light component of first direction polarization and reflection along with the polarized light separation membrane of the linearly polarized light component of the perpendicular direction polarization of first direction; With a solar cell, wherein these elements are layered on another by this of order.
Fig. 1 is the synoptic diagram according to the display device of one embodiment of the present of invention.
Fig. 2 is a perspective schematic view of expressing the inner structure of the polarized light separation membrane that is used as structure major part shown in Figure 1.
Fig. 3 is a synoptic diagram of expressing the effect of polarized light separation membrane shown in Figure 2.
Fig. 4 expresses the cut-open view of conduct according to the accutron section structure of the above embodiment of the present invention electronic watch.
Fig. 5 is a planimetric map of expressing the parts example that is used in the accutron shown in Figure 4.
Fig. 6 is the decomposition diagram of expressing as the electronics pocket calculator major part of an application of display device of the present invention.
Fig. 7 expresses the schematic cross sectional views that is used in according to an example of liquid crystal indicator in the electronic watch of the present invention.
Fig. 8 is the cut-open view of expressing according to the electronic watch section structure of one embodiment of the invention.
Fig. 9 is an amplification view of expressing section structure major part shown in Figure 8.
Figure 10 is the front elevation according to the above embodiment of the present invention electronic watch.
Figure 11 is the skeleton view of implementing as the transparent surface ballistic device of liquid crystal indicator major part shown in Figure 7.
Figure 12 is a cut-open view of expressing luminescent device section structure shown in Figure 11.
Figure 13 is as the schematic cross sectional views according to liquid crystal indicator in another embodiment of the present invention electronic watch.
Figure 14 is the schematic cross sectional views that is used in according to liquid crystal indicator in further embodiment of this invention electronic watch.
Figure 15 expresses the cut-open view of photoconduction to a kind of form of parts.
Figure 16 is the cut-open view of photoconduction to the another kind of form of parts.
Figure 17 is the cut-open view of photoconduction to another form of parts.
Figure 18 is the cut-open view of photoconduction to another form of parts.
Figure 19 is a photoconduction to parts a kind of cut-open view of form also.
Figure 20 is a synoptic diagram of expressing the example major part of conventional display device.
Fig. 4 expresses the especially cross-section structure of an accutron embodiment of an electronic watch, this electronic watch with display of the present invention as the display part.This wrist-watch comprises: the shell of being made by for example plastics 1; Be contained in the parts 2 of 1 li on shell; Be fixed on the shell and place glass sheet 3 on the parts 2; With the bonnet 4 that is used for fixing parts 2.Label 6 is represented watchband.
Polarizer 11 is made by polarizer commonly used, be used for by absorption, scattering or similar effect transmission along the linearly polarized light component of first direction polarization and forbid transmission along with the linearly polarized light component of the perpendicular direction polarization of first direction.In the present embodiment, place polarizer 11 to such an extent that its axis of homology points to the direction vertical with Fig. 1 paper plane.Polarized light separation membrane 12 is made by having as shown in Figure 2 wherein the polarized light separation membrane of the structure of stacked many films.As mentioned above, polarized light separation membrane 12 is used for transmission along the linearly polarized light component of second direction polarization and reflect other linearly polarized light component rather than absorb them, especially be used for total reflection along with the meet at right angles linearly polarized light of direction polarization of the axis of homology.
In the polarized light separation membrane 12 of present embodiment, thickness t 1, t2, the t3 of each layer it ... (see figure 2) is set to such an extent that be convenient to the light of all wavelengths in the reflect visible light district.The surface that faces the polarized light separation membrane 12 of liquid crystal layer part 8 can be to be used for the plane of specular light, or light scattering layer, i.e. diffusion layer.Under the situation on plane, are direct reflection images from the reflected image of polarized light separation membrane 12.Under the situation of diffusion layer, do not have pattern from the reflected image of polarized light separation membrane 12, and be monochrome image (being generally white).Can suitable color be added on the image by on the surface of polarized light separation membrane 12, forming a color layer.
The surface of solar cell 18--be that optical receiving surface has dead color in the mode identical with conventional solar cells, black or dark blue for example.Solar cell 18 is transformed into from optical receiving surface reception extraneous light and light.Give the battery charge that is used for the wrist-watch driving, output when the needs electricity consumption drives wrist-watch then by changing the electricity that is produced.
Among Fig. 4, liquid crystal layer part 8 comprises relative a pair of transparent glass substrate 13a and 13b.With one of the sealing liquid crystal of for example TN liquid crystal L be formed at this between the glass substrate, be called the gap in box gap.As shown in Figure 5, glass substrate 13a and 13b are equipped with a plurality of transparency electrodes 14 that are used for showing such as the category information of numeral and letter.In the present embodiment, transparency electrode is divided into seven sections to show one-bit digital.
Can describedly apply predetermined voltage between to a pair of segmented electrode 14 relative among glass substrate 13a and the 13b being formed at respectively.Depend on and apply (conducting) voltage or apply (shutoff) voltage and can be set in one of two alignments to liquid crystal L.Set the liquid crystal of present embodiment to such an extent that it does not change the polarization axle that passes linearly polarized light wherein under on-state, on the other hand, it reverses 90 ° of angles at the polarization axle of the following linearly polarized light of off state.
Below will provide description to accutron work with said structure.
At first, in display background, liquid crystal layer part 8 among Fig. 1 is placed under the off state.Then, shown in arrow Q among the figure, along perpendicular to the linearly polarized light of paper plane direction polarization from extraneous light--be to pass polarizer 11 natural light and be transformed into along the linearly polarized light that is parallel to paper plane direction polarization, 90 ° of angles have been reversed by the liquid crystal layer part 8 under the off state in its polarization direction.This linearly polarized light passes polarized light separation membrane 12, arrives the optical receiving surface of solar cell 18, in solar cell a large amount of light is transformed into electric energy.Sub-fraction light is transformed into reflected light, and after they passed polarized light separation membrane 12, liquid crystal layer part 8 and polarizer 11, the beholder saw them.Since the optical receiving surface of solar cell 18 be such as black or dark blue dead color, so the color of being seen also is a kind of like this dead color.
In the information that shows such as numeral, liquid crystal layer part 8 shown in Figure 1 is placed under the conducting state.Then, taken out from extraneous light, along the linearly polarized light perpendicular to paper plane direction polarization by polarizer 11, shown in arrow P, this linearly polarized light passes liquid crystal layer part 8.At this moment, because liquid crystal layer part 8 is in conducting state, so the polarization direction of torsion line polarized light and it is kept perpendicular to paper plane not.Therefore, this linearly polarized light is reflected according to wavelength by the interface of interlayer in the polarized light separation membrane 12, after the light that is reflected passes liquid crystal layer part 8 and polarizer 11 successively, the light that is reflected is shown in the outside.Thus, the conducting state section that shows transparent segment electrode 14 shown in Figure 5 with the reflection colour of polarized light separation membrane 12.This reflection colour is the light tone such as silver color, grey or white.
According to top described, when in the present embodiment when utilizing outside natural light to produce watch displays, use reflected light from the surface of solar cell 18 with dark-coloured display background, and since from the dark reflected colour of polarized light separation membrane 12 information such as numeral is shown thereon.Therefore, can have no any practical difficulty and be clear that information such as numeral.In addition, shown in Fig. 1 and 5, because solar cell 18 is put into the viewing area of wrist-watch,, can significantly reduce the overall dimensions of electronic watch so compare with the situation that wherein solar cell is placed on the outside, viewing area.
Fig. 6 expresses wherein display device of the present invention another embodiment as electronics pocket calculator display part.In the present embodiment, the digital display screen 21 of electronics pocket calculator 20 is made of display device of the present invention.In the G of the screen position of pocket calculator 20, solar cell 18, polarized light separation membrane 12, liquid crystal layer part 8 and polarizer 11 according to this order be stacked on another from following one, they have constituted digital display screen 21.
Said elements--polarizer 11, liquid crystal layer part 8, polarized light separation membrane 12 and solar cell 18 are worked in the mode identical with same numeral representative element among Fig. 1, therefore, omit detailed description.By handling various keys 22 selectively, can be shown on the digital display screen 21 based on segmented electrode conducting/off state in the liquid crystal layer part 8 needed number with as the numeral that result of calculation obtains.At this moment, come display background by optical receiving surface with dead color, and the information such as numeral is clearly shown thereon with the light tone such as silver color or grey with solar cell 18.
In electronics pocket calculator 20,, needn't prepare a zone for solar cell 18 being placed on outside the screen district G, this feasible overall dimensions that can significantly reduce counter 20 owing to also solar cell 18 is put into the viewing area of liquid-crystal display section 8.
Although described the present invention with reference to the preferred embodiment relevant, but the present invention is not limited to these embodiment, can make various modifications by claims within the determined scope of the present invention with claim 1 and 3.
For example, use the situation in the accutron, and Fig. 6 has illustrated that wherein it uses situation in the electronics pocket calculator, but display device of the present invention also can be used as the display part of other kinds electronic device although Fig. 4 has illustrated display device wherein of the present invention.In addition, although the present invention uses in the wrist-watch in embodiment illustrated in fig. 4, but, it also can be used in the electronic watch with another kind of structure certainly, for example stopwatch.
Although in above embodiment, the liquid crystal board that adopts the TN liquid crystal is used as the polarization axle modifier, this device can be used for changing the state of desiring transmission-polarizing polarisation of light axle and be used for keeping selecting between the constant state of polarization axle, but also can replace with the liquid crystal board that adopts stn liquid crystal or ECB liquid crystal.
Also have, although the sandwich construction that wherein is laminated with a plurality of films as shown in Figure 2 is used as second polarized-light separation device, this second polarized-light separation device be used for transmission along the linearly polarized light component of second direction polarization and reflection along with the linearly polarized light component of second direction vertical direction polarization, but it can also replace in order to lower device: 1) polarized light separation sheet, and it has the structure that wherein quarter-wave λ sheet is placed the one or both sides of cholesteric liquid crystal layer; 2) polarization separation section part is constructed it to such an extent that can be divided into reflect polarized light and transmission-polarizing light with Brewster angle (SID 92 Digest, 427-429 page or leaf); Or 3) the polarization separation section part of employing holofilm.
Fig. 8 expresses the electronic watch according to one embodiment of the invention, especially accutron.This electronic watch comprises: for example by plastics or metal shell 1; Be contained in the parts 2 in the shell 1; Be fixed on the shell 1 and place glass sheet 3 on the parts 2; With the bonnet 4 that is used for fixing parts 2.Label 6 is represented watchband.
As shown in Figure 9, parts 2 comprise: framework 7; Liquid crystal indicator 5 by framework 7 supportings; With the circuitry substrate 10 that places under the liquid crystal indicator 5.As shown in Figure 7, liquid crystal indicator 5 comprises: liquid crystal layer part 8, and it is as the polarization axle modifier; Polarizer 11 places beholder's one side (figure upside) of liquid crystal layer part 8 to it, and it is as first polarized-light separation device; With polarized light separation membrane 12, as from observer one side, it places the back side (figure downside) of liquid crystal layer part 8, and it is as second polarized-light separation device.At the back side of polarized light separation membrane 12, diffusion layer 15, transparent surface ballistic device 29 and solar cell 18 are housed successively also.
Polarized light separation membrane 12 constitutes by having the polarized light separation membrane that wherein is laminated with many membrane structures as shown in Figure 2.Among Fig. 7, polarized light separation membrane 12 transmissions from the light of liquid crystal layer part 8 one side incidents, along second direction--in the present embodiment, along direction--the linearly polarized light component of polarization vertical with paper plane, and reflect other polarized light, especially total reflection is along the light that is parallel to paper plane direction polarization.In addition, polarized light separation membrane 12 also is used for transmission from a side relative with liquid crystal layer part 8--promptly from the light of luminescent device 29 1 side incidents, along with the polarized light component of paper plane vertical direction polarization.
In the polarized light separation membrane 12 of present embodiment, thickness t 1, t2, the t3 of each layer A and B ... (see figure 5) is set to such an extent that be convenient to reflect the light that is included in all wavelengths in the visible region.Can a plane that be used for direct reflection light towards the surface of the polarized light separation membrane 12 of liquid crystal layer part 8, or light scattering layer, i.e. a diffusion layer.Under the situation on plane, are direct reflection images from the reflected image of polarized light separation membrane 12.Under the situation of diffusion layer, do not have pattern from the reflected image of polarized light separation membrane 12, and be monochrome image (being generally white).Can be added to a kind of suitable color in this image and go by on the surface of polarization separating film 12, forming a color layer.
The surface of solar cell 18--be optical receiving surface with the mode identical with common solar cell have for such as black or dark blue dead color.Solar cell 18 changes into from optical receiving surface reception extraneous light and these light.Charging into the battery that is used for the wrist-watch driving, when needed electricity is exported from this battery so that drive wrist-watch then by changing the electricity that produces.
Among Fig. 7, liquid crystal layer part 8 comprises a pair of relative transparent substrates 13a and 13b.Use sealing liquid crystal such as TN liquid crystal L to be formed between the transparent substrates, be called the gap of box gap (cell gap). Transparent substrates 13a and 13b are made by the transparent material such as glass or plastics.Within it on the surface, a plurality ofly be used for showing that the transparency electrode 14a and the 14b of the visual information of being made up of numeral, letter or suchlike information are made by ITO (indium tin oxide) or suchlike thing.On the substrate surface that has electrode 14a and 14b to form, alignment is also made by polyimide, polyvinyl alcohol (PVA) etc., and they are subjected to the registration process such as friction.
In the present embodiment, as shown in figure 10, transparency electrode 14a and 14b form the pattern that wherein is provided with six one-bit digitals, and each one-bit digital is formed by seven sections.By changing the color of some sections in these sections selectively, can show that various numerals are to be used for time showing.Certainly, also can show any other information that are not numeral when needed.
The ballistic device of transparent surface shown in Fig. 7 29 comprises: photoconduction is made the shape as a sheet with transmittance performance to it to parts 28; Be positioned at a plurality of light sources of photoconduction to parts 28 1 sides, the LED shown in Figure 11 and 12 (light emitting diode) 30 for example, light source is 3 in the present embodiment.The surperficial 28a of upside glazing guiding parts 28 is as light exit surface, i.e. beholder's one side surface in the drawings.Light exit surface 28a is equipped with the cylindrical protrusions 31a that the even or inhomogeneous point in a plurality of edges is arranged and outwards given prominence to.Reflective membrane 32 is adhered to photoconduction being provided with on those sides outside the LED30 side to parts 28.
Photoconduction can be by making with the lower part to parts 28: the 1) transparent resin such as acrylic resin, polycarbonate resin or amorphous polyolefin resin; 2) inorganic transparent material such as glass; Or 3) mixture of these materials.In addition, but fabricated by various methods it, for example: 1) injection molding; 2) utilize the method for the phototype setting performance of resin; 3) etching; Or 4) skim is bonded to method on transparent resin or the glass planar sheets.
As shown in figure 12,, in parts 28, penetrate from the light S1 of LED30 and S2 and be diffused into photoconduction to parts 28 inside during in the repetition total reflection that stands from the inside surface of light exit surface 28a and apparent surface at photoconduction.Reflect the light that has been diffused on the side with the reflective membrane 32 that is formed at the side, and make these light be diffused into the inside of photoconduction once more to parts 28.Between this diffusion period, the light that has arrived protruding 31a one side is mapped to the outside, and the liquid crystal layer part 8 among directive Fig. 7, i.e. directive beholder one side.Almost completely never do not form the surface ejaculation of protruding 31a from the light of LED30.
Electronic watch with said structure has two kinds of display modes: adopt the reflection display mode of outside natural light and adopt the optical transmission display mode of penetrating selfluminous element 29.Below these descriptions will be described one by one.
(reflection display mode)
Referring to Fig. 7, showing with extraneous light and making under luminescent device 29 non-luminous situations, when between the electrode 14a of liquid crystal layer part 8 and 14b, applying shutoff voltage, shown in arrow P, from extraneous light the linearly polarized light that is parallel to paper plane is taken out by polarizer 11.In addition, by liquid crystal layer part 8 this linearly polarized light is changed into the linearly polarized light perpendicular to paper plane that about 90 ° of angles are reversed in its polarization direction.Then this linearly polarized light passes polarized light separation membrane 12, diffusion layer 15 and photoconduction to parts 28, also has, and absorbs this linearly polarized light by the optical receiving surface of solar cell 18.Thus, the zone that applies shutoff voltage is shown as background dark-coloured such as black.Function according to solar cell 18 is transformed into electric energy to the light that is received by solar cell 18, these electric energy is charged into to be used for driving in the power storage part of wrist-watch when needed.
Then, when forward voltage being applied on the liquid crystal layer part 8, shown in arrow Q, the linearly polarized light that is parallel to paper plane is taken out from outside natural light by polarizer 11, but also make this linearly polarized light keep parallel and do not make liquid crystal layer part 8 reverse its polarization direction basically with paper plane.According to the function of polarized light separation membrane 12, by polarized light separation membrane 12 these linearly polarized lights of reflection.The light that is reflected passes liquid crystal layer part 8, keeps parallel with paper plane simultaneously, and it also passes polarizer 11, is mapped to the outside.This makes the beholder to see to depend on the reflected colour image of polarized light separation membrane 12 surface appearances, for example, and direct reflection image or white image.As described in about Figure 10, the forward voltage district is regarded as visual image such as a numeral.
As mentioned above, when under reflection display mode, showing to show with outside natural light, apply in the district background that shows black or color like that at shutoff voltage, simultaneously, apply in the district in forward voltage white or Adjacent color visual information are shown as wrist-watch information.Apply the district by the extraneous light that arrives solar cell 18 at shutoff voltage and produce electric energy, accumulate electric energy when needed.
(transmissive display mode)
When the time display surface be deceive and when being difficult to see it at night or in the dark room, light the LED30 of luminescent device 20.In this case, shutoff voltage is being applied in the zone of liquid crystal layer part 8, the light of penetrating from LED is diffused into the inside of photoconduction to parts 28, then as shown in arrow R is concise and to the point, from light exit surface 28a directive beholder one side (i.e. upside the figure).This ejaculation light passes diffusion layer 15, is taken out as the linearly polarized light perpendicular to paper plane by polarized light separation membrane 12, and is transformed into the linearly polarized light that is parallel to paper plane by liquid crystal layer part 8, and about 90 ° of angles are reversed in its polarization direction.This linearly polarized light passes polarizer 11, is shown in the outside.This makes the beholder can see that as a setting painted light, this light penetrates from photoconduction to parts 28 and pass diffusion layer 15, as a setting.Penetrate from photoconduction and be generally white to the light of parts 28, and by diffusion layer 15 scatterings, thereby the beholder can see the white light background.
Then, in the zone that forward voltage is applied on the liquid crystal layer part 8, shown in arrow T was concise and to the point, the light of penetrating from LED30 penetrated from the light exit surface 28a of photoconduction to parts 28, passed diffusion layer 15 and took out the linearly polarized light of conduct perpendicular to paper plane by polarized light separation membrane 12.Because this linearly polarized light passes liquid crystal layer part 8 and does not reverse its polarization direction, so its polarization axle is not consistent with the axis of homology of polarizer 11.Therefore, this linearly polarized light is absorbed by polarizer 11.So, be black display when this zone is seen by the beholder.
As mentioned above, when the transmissive display mode of penetrating selfluminous element 29 with utilization was shown to show, white or Adjacent color background were shown in shutoff voltage and apply in the district, simultaneously, apply in the district in forward voltage visual information is shown as black or similar color table information.Because under this transmissive display mode, few light enters in the solar cell 18, so carry out the generation of electric energy by solar cell 18 hardly.
As mentioned above, according to the electronic watch of present embodiment, no matter be the light that adopts outside natural light or penetrate selfluminous element 29, can produce the watch displays of numeral or similar information form with a different colours, be used for clearly being different from background.Even when the table display surface of solar cell being put into display digit or similar information regional, also can have no hell and high water ground and show to show therefore.So, can do the optical receiving region of solar cell greatly as far as possible, and provide bigger electric energy for being used for the power supply of table-drive.
Figure 13 expresses the liquid crystal indicator that is used in according in the electronic watch of further embodiment of this invention.This liquid crystal indicator 25 is different from liquid crystal indicator shown in Fig. 75, difference is, in liquid crystal indicator 25, storage light luminescent layer 26 is placed between polarized light separation membrane 12 and the solar cell 18, rather than placing between transparent surface ballistic device 29 and the diffusion layer 15 shown in Fig. 7.Label identical among Figure 13 and 7 is represented components identical, therefore, omits description of them.
The upper surface of storage light luminescent layer 26 is as optical receiving surface and light-emitting area.When extraneous light is received by the optical receiving surface that stores up light luminescent layer 26, it is deposited in inside as energy.When the outside is very dark, depositing energy is mapped to the outside as light.Also have, storage light luminescent layer 26 has a kind of storage optical property, and have that transmission is a certain amount of can be to the performance of the light of solar cell 18 chargings.
In the electronic watch of present embodiment, when carrying out watch displays with extraneous light, shown in arrow P, extraneous light passes polarizer 11, liquid crystal layer part 8, polarized light separation membrane 12 and the Chu Guang luminescent layer 26 that applies in the shutoff voltage zone successively, then, it arrives the optical receiving surface of solar cell 18.The beholder is regarding this zone as dark-coloured background.Simultaneously, the light that arrives solar cell 18 is transformed into electric energy and uses the power supply that acts on watch displays.In applying the zone of forward voltage, shown in arrow Q, the information such as numeral is shown in the mode similar to situation shown in Fig. 7 by the light from polarized light separation membrane 12 reflections.
In the time of in using this electronic watch at night or being placed on it between dark place, the energy that deposits storage light luminescent layer 26 inside in is penetrated from light-emitting area as light.In this case, shown in arrow R, the light of being launched passes polarized light separation membrane 12, liquid crystal layer part 8 and the polarizer 11 that is turned off in the zone that voltage is applied to liquid crystal layer part 8, and it is shown in the outside then.This make the beholder can penetrate from store up light luminescent layer 26 coloured light regard background as.
On the other hand,, shown in arrow T, penetrate from the light that stores up light luminescent layer 26 and pass polarized light separation membrane 12 and liquid crystal layer part 8, absorb by polarizer 11 being applied in the zone of liquid crystal layer part 8 connecting voltage.Therefore, by the beholder black display is regarded as in this zone.
As mentioned above, the electronic watch of present embodiment can need not the storage light luminescent layer 26 realization transmissive display modes of its own power supply by utilization.In addition, this electronic watch can be transformed into electric energy to extraneous light by utilizing solar cell 18, and can be the energy of electric energy as wrist-watch.
Figure 14 expresses the liquid crystal indicator that is used for according to the electronic watch of another embodiment of the present invention.This liquid crystal indicator 35 is different from the liquid crystal indicator 5 shown in Fig. 7, difference is, the storage light luminescent layer 26 in the liquid crystal indicator 35 is placed between polarized light separation membrane 12 and the transparent surface ballistic device 29 rather than the scattering layer shown in Fig. 7 15.Label identical among Figure 14 and 7 is represented components identical, therefore, omits description of them.
According to present embodiment, can be by also other by producing watch displays with the light of penetrating self-induced transparency surface emitting device 29 with penetrating from the light that stores up light luminescent layer 26.Preferably, at first by showing with the light of penetrating from storing up light luminescent layer 26.When light quantity is reduced to actual and inadequate amount, lights a LED30 of luminescent device 29, and use the light of penetrating selfluminous element 29.
In parts 28, light exit surface 28a is equipped with cylindrical protrusions 31a so that the light of LED30 is got the outside from light exit surface 28a at the photoconduction shown in Fig. 7 and 14.As shown in figure 15, can make cylinder shape groove 33a replace these protruding 31a to be formed on the light exit surface 28a.In addition, as shown in figure 16, tapered protrusion 31b can be formed at the back side of photoconduction to the light exit surface 28a of parts 28.Also have, as shown in figure 17, conical socket 33b can be formed at the back side of photoconduction to the light exit surface 28a of parts 28.Have, as shown in figure 18, hemispherical projections 31c can be formed at the back side of photoconduction to the light exit surface 28a of parts 28 again.Also have, as shown in figure 19, hemispherical groove 33c can be formed at the back side of photoconduction to the light exit surface 28a of parts 28.
According to wanting in desired display device and the claim 3 in the claim 1 The electronic watch of asking is because at least one is used for the polarization axle modifier is clipped in the middle Polarized light separation membrane is by having transmission along the linearly polarized light of a direction polarization and reflection The polarization separating element of other linearly polarized light characteristic consists of, so work as solar-electricity When the pond was used as reflector, the information such as numeral can be shown in a light tone On the dark-coloured background. Therefore, in addition when solar cell when the reflector also Can have no any practical difficulty real estate green hand shows to show or other demonstration.
In addition, because the background in the display plane--be the wider district in the display plane The territory is as the optical receiving surface of solar cell, so solar cell is collected A large amount of extraneous lights also can be transformed into electric energy to these extraneous lights. Also have, because Can put into the viewing area that shows such as the category information of digital information to solar cell In, so, and wherein divide open conventional situation phase solar cell and viewing area Ratio can significantly than the overall dimensions of small displays spare and electronic watch, maybe can be wrist-watch Show or like thatly set up a wider viewing area.
According to desired electronic watch in the claim 5, can obtain and claim The similar advantage of those advantages of desired electronic watch in 3. Also have since when from When beholder one side sees, the transparent surface emitter is placed on second polarised light separates dress So the back side of putting is can be with penetrating self-luminous in the dark place that does not have extraneous light to enter The light of device produces watch displays.
Claims (10)
1. display device comprises:
First polarized-light separation device is used for transmission along the linearly polarized light component of first direction polarization, and be used for forbidding along and the transmission of the linearly polarized light component of the perpendicular direction polarization of this first direction;
The polarization axle modifier is provided with this device to receive the linearly polarized light that penetrates from described first polarized-light separation device and to select changing between the constant state of the state of desiring transmission-polarizing polarisation of light axle and maintenance polarization axle;
Second polarized-light separation device, cross described polarization axle modifier described second polarized-light separation device be arranged on the opposite of described first polarized-light separation device, in order to transmission along the linearly polarized light component of second direction polarization and reflection along with the linearly polarized light component of the perpendicular direction polarization of this second direction; With
A solar cell is crossed described second polarized-light separation device described solar cell is arranged on the opposite of described polarization axle modifier, in order to receive extraneous light and to change extraneous light into electric energy.
2. display device according to claim 1, it is characterized in that, described second polarized-light separation device has and comprises two kinds of sandwich constructions that layer is alternately laminated, has identical refractive index in one direction along two in the adjacent described a plurality of layers of stacked direction, and one with its rectangular direction on have different refractive indexes, and the thickness of described a plurality of layer on stacked direction are different.
3. one kind is used for timing and show the electronic watch of time, comprises;
First polarized-light separation device is used for transmission along the linearly polarized light component of first direction polarization, and be used for forbidding transmission along and the linearly polarized light component of the perpendicular direction polarization of this first direction;
The polarization axle modifier is provided with this device to receive the linearly polarized light that penetrates from described first polarized-light separation device and to select changing between the constant state of the state of desiring transmission-polarizing polarisation of light axle and maintenance polarization axle;
Second polarized-light separation device, cross described polarization axle modifier described second polarized-light separation device be arranged on the opposite of described first polarized-light separation device, in order to transmission along the linearly polarized light component of second direction polarization and reflection along with the linearly polarized light component of the perpendicular direction polarization of this second direction;
A solar cell is crossed described second polarized-light separation device described solar cell is arranged on the opposite of described polarization axle modifier, in order to receive extraneous light and to change extraneous light into electric energy.
4. electronic watch according to claim 3, it is characterized in that, described second polarized-light separation device has and comprises two kinds of sandwich constructions that layer is alternately laminated, has identical refractive index in one direction along two in the adjacent described a plurality of layers of stacked direction, and one with its rectangular direction on have different refractive indexes, and the thickness of described a plurality of layer on stacked direction are different.
5. one kind is used for timing and show the electronic watch of time, comprising:
First polarized-light separation device is used for transmission along the linearly polarized light component of first direction polarization, and be used for forbidding along and the transmission of the linearly polarized light component of the perpendicular direction polarization of this first direction;
The polarization axle modifier is provided with this device to receive the linearly polarized light that penetrates from described first polarized-light separation device and to select changing between the constant state of the state of desiring transmission-polarizing polarisation of light axle and maintenance polarization axle;
Second polarized-light separation device, cross described polarization axle modifier described second polarized-light separation device be arranged on the opposite of described first polarized-light separation device, in order to transmission along the linearly polarized light component of second direction polarization and reflection along with the linearly polarized light component of the perpendicular direction polarization of this second direction;
The transparent surface emitter is crossed the opposite that described second polarized-light separation device is arranged at described transparent surface emitter described polarization axle modifier; With
A solar cell is crossed described transparent surface reflection unit described solar cell is arranged on described the and the opposite of polarized-light separation device, in order to receive extraneous light and to change extraneous light into electric energy.
6. the electronic watch according to claim 5 is characterized in that, described transparent surface emitter comprises: be used for luminous light source; With the light control member that light exit surface is set on described that side of polarization axle modifier, in order to light from described light source-guide to described light exit surface.
7. the electronic watch according to claim 6 is characterized in that, described light control member has a protruding part or a recessed part on described light exit surface or its opposite, so that from described light exit surface emission light.
8. one kind according at least one electronic watch in the claim 5 to 7, it is characterized in that described transparent surface emitter comprises a storage light luminescent layer.
9. one kind according at least one electronic watch in the claim 5 to 8, it is characterized in that described transparent surface emitter beholder one side is provided with a diffusion layer.
10. electronic watch comprises:
A polarization plates;
A TN liquid crystal layer;
A polarized light separation membrane, be used for transmission along the linearly polarized light component of first direction polarization and reflection along with the linearly polarized light component of the perpendicular direction polarization of this first direction;
A solar cell;
Wherein described these elements are placed in a mode on another by this order.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20947597 | 1997-08-04 | ||
| JP209475/97 | 1997-08-04 | ||
| JP35573497 | 1997-12-24 | ||
| JP355734/97 | 1997-12-24 | ||
| JP10161211A JPH11242086A (en) | 1997-08-04 | 1998-06-09 | Display and electronic timepiece using the same |
| JP161211/98 | 1998-06-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1213098A true CN1213098A (en) | 1999-04-07 |
Family
ID=27321824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98116869A Pending CN1213098A (en) | 1997-08-04 | 1998-08-03 | Display device and electronic watch using the device |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6229767B1 (en) |
| JP (1) | JPH11242086A (en) |
| CN (1) | CN1213098A (en) |
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| US20160104751A1 (en) * | 2014-10-10 | 2016-04-14 | The Swatch Group Research And Development Ltd | Hybrid display assembly including a solar cell |
| JP2019029164A (en) * | 2017-07-28 | 2019-02-21 | セイコーエプソン株式会社 | Wearable apparatus |
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| JPS5255565A (en) | 1975-10-30 | 1977-05-07 | Seiko Epson Corp | Electronic watch |
| US4183628A (en) | 1976-05-20 | 1980-01-15 | Ebauches S.A. | Electronic watch and display device for such watch |
| CH609199B (en) | 1976-05-20 | Ebauches Sa | ELECTRONIC INSTRUMENT. | |
| US4095217A (en) * | 1977-03-07 | 1978-06-13 | Hirotsugu Tani | Combined liquid crystal display and photovoltaic converter |
| JPS60147720A (en) | 1984-01-12 | 1985-08-03 | Seikosha Co Ltd | Color display device |
| JPS62273410A (en) | 1986-04-04 | 1987-11-27 | シヤ−ウツド・メデイカル・カンパニ− | Portable electronic patient monitor |
| US5359691A (en) | 1992-10-08 | 1994-10-25 | Briteview Technologies | Backlighting system with a multi-reflection light injection system and using microprisms |
| JP4091978B2 (en) | 1993-12-21 | 2008-05-28 | スリーエム カンパニー | Reflective polarizer with enhanced brightness |
| KR0156272B1 (en) | 1993-12-31 | 1998-12-01 | 강박광 | Catalyst for conversion of methane to ethylene preparation thereof and process for manufacturing ethylene using said catalyst |
| AU2242295A (en) | 1994-04-06 | 1995-10-30 | Minnesota Mining And Manufacturing Company | Polarized light sources |
| US5751388A (en) | 1995-04-07 | 1998-05-12 | Honeywell Inc. | High efficiency polarized display |
-
1998
- 1998-06-09 JP JP10161211A patent/JPH11242086A/en active Pending
- 1998-07-30 US US09/124,991 patent/US6229767B1/en not_active Expired - Lifetime
- 1998-08-03 CN CN98116869A patent/CN1213098A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101501581B (en) * | 2006-08-09 | 2012-07-04 | 西铁城时计河口湖株式会社 | Display panel and apparatuses provided with same |
| CN103969871A (en) * | 2014-04-21 | 2014-08-06 | 合肥鑫晟光电科技有限公司 | Display device |
| CN111090191A (en) * | 2018-10-24 | 2020-05-01 | 中强光电股份有限公司 | Light source module and double-screen display device |
Also Published As
| Publication number | Publication date |
|---|---|
| US6229767B1 (en) | 2001-05-08 |
| JPH11242086A (en) | 1999-09-07 |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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